Search REST API in SharePoint 2013 makes it very easy to quickly check the value stored in the search index for any managed property. For example, let’s say you have a SharePoint list and one of the custom columns in that list is a publishing image field. You need to display the image in search results but are not sure what type of value is stored in the search index. Is it an absolute url to the image? A relative url? Maybe an entire image HTML tag?
A quick way to check exactly what it is by using the Search REST API. First, let’s run a simple Search REST API query and see what managed property values are returned.
http://intranet.contoso.com/_api/search/query?querytext='contenttype:banner'
Since only standard managed properties are included by default, add the selectproperties parameter to the query.
http://intranet.contoso.com/_api/search/query?querytext='contenttype:banner'&selectproperties='BannerImageOWSIMGE'
Similar to querytext and selectproperties, many other KeywordQuery object model properties can be used as parameters for Search REST API calls.